SDR ASAA2017071821412

Service difficulty report · Fmc · Boeing 737990ER

Difficulty date: July 18, 2017
Submitted: July 19, 2017
Operation: Air carrier
Aircraft: N457AS
Make and model: Boeing 737990ER
Aircraft serial: 36355
Aircraft time: 13,839 hours, 4,573 cycles
System (JASC): 3460 · Flight Management Computing Hardware System
Part: Fmc
Condition: Malfunctioned
Stage of operation: AP
How discovered: O
Nature of condition: J
Precautionary procedure: O

As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.

What was found

DURING VECTORS TO APPROACH, THE FMC DISAGREE VERTICAL ANNUNCIATED. CONDUCTED QRH. NO OTHER ANOMALIES. ACFT GROUNDED. REPORTED BY CREW, FMC RETURNED TO NORMAL BEFORE LANDING. ACCOMPLISHED FMC BITE CHECK IAW FIM 34-61 TASK 801. NO FAULTS LOGGED, FMC CHECKED NORMAL.